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한국고무학회> Elastomers and composites

Elastomers and composites update

  • : 한국고무학회
  • : 공학분야  >  화학공학
  • : KCI등재
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  • : 연속간행물
  • : 계간
  • : 2092-9676
  • : 2288-7725
  • : 고무학회지(~1997) → 엘라스토머(1998~) → elastomers and composites(2009~)

수록정보
수록범위 : 1권1호(1966)~56권4호(2021) |수록논문 수 : 1,674
Elastomers and composites
56권4호(2021년 12월) 수록논문
최근 권호 논문
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KCI등재

1A Study on the Effect of Petroleum Resin on Vibration Damping Characteristics of Natural Rubber Composites

저자 : Yu Mi Yun , Jin Hyok Lee , Myoung Chan Choi , Jung Wan Kim , Hyun Min Kang , Jong Woo Bae

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 201-208 (8 pages)

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In this study, the effect of petroleum resin on the mechanical strength, morphology, and vibration damping characteristics of natural rubber (NR) composites was observed. The NR composites plasticized by adding petroleum resin showed decreased hardness and mechanical properties. A morphology analysis indicated that as the amount of petroleum resin increased, carbon black aggregates (or agglomerates) observed at the fracture surface decreased, resulting in an improvement in the dispersibility. In addition, as 20 phr of petroleum resin was added, the effective damping temperature range increased by approximately 11.4%, the hysteresis loss rate increased by 15.2%, and the resilience decreased by 36.6%. Therefore, it was confirmed that the vibration damping characteristics improved with the addition of petroleum resin. This was because the rubber-filler interaction between the NR molecular chain of the NR composite and the carbon black particles improved by the addition of petroleum resin.

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2Effect of Phenyl Vinyl Methyl Silicone (PVMQ) on Low Temperature Sealing Performance of Fluorosilicone Composites

저자 : Jin Hyok Lee , Jong Woo Bae , Myoung Chan Choi , Yu-mi Yun , Nam-ju Jo

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 209-216 (8 pages)

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In this study, we observed the mechanical properties, thermal stability, and low temperature sealing performance of fluorosilicone elastic composites. When the blend ratio of Phenyl vinyl methyl silicone (PVMQ) was increased, the tensile strength, modulus at 100%, and compression set were decreased. The thermal stability of fluorosilicone elastic composites showed a similar tendency. These were caused by poorer green strength of PVMQ than Fluorosilicone rubber (FVMQ). The change in the tensile strength and elongation at -40℃ showed a decreasing tendency with increasing PVMQ blend ratio. By increasing the PVMQ blend ratio, low-temperature performance was improved. The Dynamic mechanical analysis (DMA) results showed that Tg was decreased and low-temperature performance was improved with increasing PVMQ blend ratio. However tanδ was decreased becaused of the poor green strength and elasticity of PVMQ. From a hysteresis loss at -40℃, the hysteresis loss value was increased and fluorosilicone elastic composites showed the decreasing tendency of elasticity with increasing PVMQ blend ratio. From the TR test, TR10 was decreased with increasing PVMQ blend ratio. FS-4 (45% PVMQ blended composites) showed a TR10 of -68.0℃ that was 5℃ lower than that of FS-1 (100% FVMQ). The gas leakage temperature was decreased with increasing PVMQ blend ratio. The gas leakage temperature of FS-4 was -69.2℃ that was 5℃ lower than that of FS-1. Caused by the polymer chain started to transfer from a glassy state to a rubbery state and had a mobility of chain under Tg, the gas leakage temperature showed a lower value than Tg. The sealing performance at low temperature was dominated by Tg that directly affected the mobility of the polymer chain.

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3A Fabrication and Antifogging Performance of Random Polypropylene Film Containing Monoglycerides as Antifogging Agent

저자 : Wan Jo , Jin Hwan Park , Seok-ho Hwang

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 217-222 (6 pages)

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In this study, random polypropylene (rPP) was compounded with two of monoglycerides, namely, glyceryl monolaurate (GML) and glyceryl monostearate (GMS), as antifogging agents to improve its antifogging performance. rPP film samples were prepared by a film-casting method using a three-roll casting machine after melt blending through a twin screw extruder. With an increase in the monoglyceride content, the melt flow index for rPP films with GML and GMS increased, and their yield strength decreased. The incorporation of GMS in rPP was proven to be more effective in improving its physical properties than was rPP with GML. When GML and GMS were separately added to the rPP film at contents of more than 1 phr and more than 5 phr, respectively, the film exhibited antifogging performance.

KCI등재

4Effect of Molecular Weight of Epoxidized Liquid Isoprene Rubber as a Processing aid on the Vulcanizate Structure of Silica Filled NR Compounds

저자 : Gyeongchan Ryu , Donghyuk Kim , Sanghoon Song , Kiwon Hwang , Wonho Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 223-233 (11 pages)

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In this study, epoxidized liquid isoprene rubber (E-LqIR) was used as a processing aid in a silica-filled natural rubber compound to improve the fuel efficiency, abrasion resistance, and oil migration problems of truck and bus radial tire tread. The wear resistance, fuel efficiency, and extraction resistance of the compound were evaluated according to the molecular weight of E-LqIR. Results of the evaluation showed that the E-LqIR compound had a lower chemical crosslink density than that of a treated distillate aromatic extract (TDAE) oil compound because of the sulfur consumption of E-LqIR. However, the filler-rubber interaction improved because of the reaction of E-LqIR with silica and crosslink with the base rubber by sulfur. As the molecular weight of E-LqIR increased, crosslink with sulfur was facilitated, and the filler-rubber interaction improved, resulting in improved abrasion resistance. The fuel efficiency performance of the E-LqIR compound was poorer than that of the TDAE oil compound because of the low chemical crosslink density and hysteresis loss at the free chain end of E-LqIR. However, the fuel efficiency performance improved as the molecular weight of E-LqIR increased.

KCI등재

5Wear Particulate Matters and Physical Properties of ENR/BR Tread Compounds with Different Ratio of Silica and Carbon Black Binary Filler Systems

저자 : Gyeongchan Ryu , Donghyuk Kim , Sanghoon Song , Hyun Hee Lee , Jin Uk Ha , Wonho Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 234-242 (9 pages)

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The demand for truck bus radial (TBR) tires with enhanced fuel efficiency and wear resistance have grown in recent years. In addition, as the issue of particulate matter and air pollution increases, efforts are being made to reduce the generation of particulate matter. In this study, the properties of epoxidized natural rubber (ENR) containing a silica-friendly functional group were evaluated by considering it as a base rubber and varying the silica ratio in this binary filler system. The results showed that the wear resistance of the NR/BR blend compound decreased as the silica ratio increased. In contrast, the ENR/BR blend compound exhibited an increase in wear resistance as the silica ratio was increased. In particular, the ENR-50/BR blend compound showed the best wear resistance due to the presence of several epoxide groups. Furthermore, we observed that for tan δ at 60℃, higher epoxide content resulted in the higher Tg of the rubber, indicating a higher tan δ at 60℃. On the other hand, it was confirmed that increasing the silica ratio decreased the value of tan δ at 60℃ in all compounds. In addition, we measured the amount of wear particulate matters generated from the compound wear. These measurements confirmed that in the binary filler system, regardless of the filler type, the quantity of the generated wear particulate matters as the filler-rubber interaction increased. In conclusion, the silica filled ENR/BR blend compound exhibited the lowest generation of wear particulate matters.

KCI등재

6Wear Particulate Matters and Physical Properties of Silica filled ENR/BR Tread Compounds according to the BR Contents

저자 : Gyeongchan Ryu , Donghyuk Kim , Sanghoon Song , Hyun Hee Lee , Jin Uk Ha , Wonho Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 243-249 (7 pages)

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The demand for truck bus radial (TBR) tires with enhanced fuel efficiency and wear resistance have grown in recent years. In addition, as the issue of particulate matter and air pollution increases, efforts are being made to reduce the generation of particulate matter. In this study, we investigated the effect of varying the content of butadiene rubber (BR) on the properties of the rubber compounds and the amount of particulate matter in the TBR tire tread compound. Furthermore, we utilized carbon black in the NR/BR blend compounds owing to its excellent compatibility, and we used silica in the ENR-25/BR blend compounds because it can interact chemically with epoxide groups. The NR/BR blend compounds and the ENR-25/BR blend compounds were evaluated by varying their BR content between 20 phr and 30 phr. The results showed that the ENR-25/BR blend compounds had superior wear resistance than the NR/BR blend compounds. This was caused by the interaction between silica and ENR. In addition, it was confirmed that the increased wear resistance as the BR content increased. Furthermore, compared to the NR/BR blend compounds, ENR-25/BR blend compounds exhibited a lower tan δ value at 60°C because silica was used as filler. This indicates a higher fuel efficiency. The measurement results for wear particulate matter showed that as increasing the BR content resulted in generation of less wear particulate matter. This was caused by the increased wear resistance. Moreover, the ENR-25/BR blend compounds with excellent filler-rubber interaction exhibited lower quantities of generated wear particulate matters as compared to the NR/BR blend compounds.

KCI등재

7Effect of Doping State on Photoresponse Properties of Polypyrrole

저자 : Jongwan Choi

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 250-253 (4 pages)

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Polypyrrole is an organic thermoelectric material which has been receiving extensive attention in recent years. Polypyrrole is applicable in various fields because its electrical properties are controllable by its doping concentration. In this study, the effects of the polypyrrole doping state on its photoresponse were investigated. The degree of doping was controlled by ammonia solution treatment. Then, the chemical structure as a function of the doping states was observed by Raman analysis. Moreover, the photocurrent and photovoltage characteristics for various doping states were measured by an asymmetrically irradiated light source. As the degree of doping increased, the electrical conductivity increased, which affected the photocurrent. Meanwhile, the photovoltage was related to the temperature gradient caused by light irradiation.

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8Synthesis and Antimicrobial Properties of the Chitosan Derivatives

저자 : Eun Kyoung Lee , You Kyoung Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 4호 발행 연도 : 2021 페이지 : pp. 254-263 (10 pages)

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In this study, chitosan obtained after varying extents of deacetylation (i.e., 10%, 30%, and 47%) was employed to introduce antibacterial properties to chitin. The deacetylation reaction completion, wherein the amino group content of chitin was reduced, was ascertained from the FT-IR and NMR analyses. The 47%-deacetylated chitosan exhibited superior antibacterial properties against Bacillus in a disk diffusion test. To further improve these properties, chitosan derivatives were grafted by acrylic acid and acrylamide. The varying concentrations of carboxyl groups, primary amines, and -CH2-CH2- with increasing acrylic acid and acrylamide contents were determined by FT-IR and NMR analyses. The enhanced antibacterial properties of the chitosan derivatives, owing to the increased acrylic acid and acrylamide contents, were revealed by the disk diffusion test. In particular, the derivatives with 1.3% acrylic acid and acrylamide showed the highest antibacterial activity, the bacterial reduction rate against Staphylococcus aureus and Escherichia coli being 99.9%, as observed through the ASTM E2149 standard test.

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